Welcome to the Auditing Program Binaries MCQs Page

Dive deep into the fascinating world of Auditing Program Binaries with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Auditing Program Binaries, a crucial aspect of Reverse Engineering. In this section, you will encounter a diverse range of MCQs that cover various aspects of Auditing Program Binaries, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Reverse Engineering.

Check out the MCQs below to embark on an enriching journey through Auditing Program Binaries. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Reverse Engineering.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Auditing Program Binaries. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Auditing Program Binaries MCQs | Page 7 of 8

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Q61.

How can attackers take advantage of the heap's linked-list structure?

By overwriting some memory address in the process's address space

By overwriting some memory address in the heap's linked list

By overwriting some memory address in the stack's linked list

By overwriting some memory address in the program's input validation process

Discuss

Answer: (a).By overwriting some memory address in the process's address space Explanation:Attackers can take advantage of the heap's linked-list structure in order to overwrite some memory address in the process's address space.

Q62.

Why are heap overflows less common than stack overflows?

Because the sizes of heap blocks are almost always dynamically calculated to be large enough to fit incoming data

Because programmers hard-code the size of a heap block when they have variably sized incoming data

Because the pointers to the next and previous heap blocks are placed either right before or right after the actual block data

Because heap blocks become a problem when the programmer miscalculates the number of bytes needed to hold a particular user-supplied buffer in memory

Discuss

Answer: (a).Because the sizes of heap blocks are almost always dynamically calculated to be large enough to fit incoming data Explanation:Heap overflows are less common than stack overflows because the sizes of heap blocks are almost always dynamically calculated to be large enough to fit incoming data.

Q63.

What is the most common example of overflow attacks?

Heap overflows

Stack overflows

String overflows

Buffer overflows

Discuss

Answer: (c).String overflows Explanation:Traditionally, a significant portion of overflow attacks have been string related.

Q64.

What is the risk of using the strcpy function?

It only stops copying when it encounters a NULL terminator, which allows an attacker to supply a string that would be too long for the target buffer.

It overwrites whatever follows the heap block in memory.

It corrupts the linked list in some way.

It causes the program to crash as soon as the heap manager traverses the linked list.

Discuss

Answer: (a).It only stops copying when it encounters a NULL terminator, which allows an attacker to supply a string that would be too long for the target buffer. Explanation:The risk of using the strcpy function is that it only stops copying when it encounters a NULL terminator, which allows an attacker to supply a string that would be too long for the target buffer.

Q65.

What are heap overflows and why are they less common than stack overflows?

Heap overflows occur when the programmer miscalculates the number of bytes needed to hold a particular user-supplied buffer in memory, and are less common because heap block sizes are dynamically calculated to fit incoming data

Heap overflows occur when the size of a heap block is predefined, and are less common because programmers rarely hard-code the size of a heap block when they have variably sized incoming data

Heap overflows occur when an outsider is allowed to provide a string that is copied into a fixed-sized internal buffer, and are less common because heap blocks typically have a dynamic size

Heap overflows occur when the caller can supply a string that is too long for the target buffer, and are less common because heap blocks are almost always dynamically calculated to be large enough to fit incoming data

Discuss

Answer: (a).Heap overflows occur when the programmer miscalculates the number of bytes needed to hold a particular user-supplied buffer in memory, and are less common because heap block sizes are dynamically calculated to fit incoming data Explanation:Heap overflows occur when the programmer miscalculates the number of bytes needed to hold a particular user-supplied buffer in memory, and are less common than stack overflows because heap block sizes are dynamically calculated to fit incoming data.

Q66.

What is the most common example of string-related overflow attacks?

The use of various runtime library string-manipulation routines for copying or processing strings in some way, while letting the routine determine how much data should be written.

The use of a fixed-size buffer to copy a user-supplied string into.

The use of ASCII characters that would become a workable shellcode once converted into Unicode.

The use of JA (jump if above) instead of JG (jump if greater) for the comparison.

Discuss

Answer: (a).The use of various runtime library string-manipulation routines for copying or processing strings in some way, while letting the routine determine how much data should be written. Explanation:The most common example of string-related overflow attacks is the use of various runtime library string-manipulation routines for copying or processing strings in some way, while letting the routine determine how much data should be written.

Q67.

What happens if an attacker's string is internally converted into Unicode before it reaches the vulnerable function?

The attacker must feed the vulnerable program a sequence of ASCII characters that would become a workable shellcode once converted into Unicode.

The attacker can bypass the buffer length check.

The caller can supply a string that is too long for the target buffer.

The vulnerable program becomes less vulnerable to overflow attacks.

Discuss

Answer: (a).The attacker must feed the vulnerable program a sequence of ASCII characters that would become a workable shellcode once converted into Unicode. Explanation:If an attacker's string is internally converted into Unicode before it reaches the vulnerable function, the attacker must feed the vulnerable program a sequence of ASCII characters that would become a workable shellcode once converted into Unicode.

Q68.

What are integer overflows?

A special type of overflow bug where incorrect treatment of integers can lead to a numerical overflow which eventually results in a buffer overflow.

A type of overflow bug that occurs when an outsider is allowed to provide a string that is copied into a fixed-sized internal buffer.

A type of overflow bug that occurs when the programmer miscalculates the number of bytes needed to hold a particular user-supplied buffer in memory.

A type of overflow bug that occurs when the size of a heap block is predefined.

Discuss

Answer: (a).A special type of overflow bug where incorrect treatment of integers can lead to a numerical overflow which eventually results in a buffer overflow. Explanation:Integer overflows are a special type of overflow bug where incorrect treatment of integers can lead to a numerical overflow which eventually results in a buffer overflow.

Q69.

What is the risk associated with adding a constant value to a user-supplied buffer length?

It can cause an integer overflow

It can cause a buffer underflow

It can cause a memory leak

It can cause a segmentation fault

Discuss

Answer: (a).It can cause an integer overflow Explanation:Adding a constant value to a user-supplied buffer length can create significant risks because an attacker could take advantage of integer overflows to create a buffer overflow.

Q70.

What happens if the addition performed on the buffer length parameter overflows?

The result would be a low positive number, possibly lower than the length of the buffer itself

The result would be a high negative number, possibly lower than the length of the buffer itself

The result would be a high positive number, possibly higher than the length of the buffer itself

The program would terminate with an error message

Discuss

Answer: (a).The result would be a low positive number, possibly lower than the length of the buffer itself Explanation:If the addition performed on the buffer length parameter overflows, the result would be a low positive number, possibly lower than the length of the buffer itself.

Page 7 of 8

Low Level Software 🔒

Windows Fundamentals 🔒

Reversing Tools 🔒

Reversing Malware 🔒

Antireversing Techniques 🔒

Breaking Protections 🔒

Reversing .NET 🔒

Deciphering Code Structures 🔒

Deciphering Program Data 🔒

Welcome to the Auditing Program Binaries MCQs Page

Auditing Program Binaries MCQs | Page 7 of 8

Explore more Topics under Reverse Engineering

Introduction to Reverse Engineering

Beyond the Documentation

Deciphering File Formats

Piracy and Copy Protection

Decompilation

Understanding Compiled Arithmetic

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